Should women say "Ameen" in a low voice when praying at home with their husbands?

Saying "Ameen" aloud is a Sunnah for every worshipper. The basic principle is that a woman should not raise her voice in the presence of non-mahram men. This is why women were forbidden from saying "Subhanallah" aloud to alert the Imam during prayer, and were instead commanded to clap. This prohibition is specific to the presence of non-mahram men. However, if she prays with only women or with her mahrams, it is permissible for her to recite aloud and say "Ameen" aloud. The ruling for saying "Ameen" aloud or silently is the same as the ruling for recitation. In summary, it is permissible for a woman to recite aloud and say "Ameen" aloud in prayer, unless she is praying in the presence of a non-mahram man, in which case she should recite silently.